> ssh-keygen -t rsa -b 4096 -C "your@email.com" Is there any evidence that 2048 bit RSA keys are insufficient? 4096 bit keys are absolutely huge. I don't know

> ssh-keygen -t rsa -b 4096 -C "your@email.com" Is there any evidence that 2048 bit RSA keys are insufficient? 4096 bit keys are absolutely huge. I don't know if working with them is also slower, but I would guess so.